Superconducting Thin Films

About

Superconductor/Ferromagnet/Superconductor (S/F/S) structures are at the forefront of modern quantum and condensed matter physics. These hybrid systems combine two seemingly contradictory states—superconductivity, with its perfect conductivity and zero electrical resistance, and ferromagnetism, characterized by its intrinsic magnetic order. The interplay between these states gives rise to a range of fascinating phenomena, including spin-triplet superconductivity, the proximity effect, and quantum interference effects.

S/F/S structures hold immense potential for technological advancements. They enable the design for ultra-sensitive magnetic sensors, energy-efficient superconducting spintronics, and components for quantum computing.

Research Focus Areas

Our research focuses on the fabrication and investigation of S/F/S structures at micrometer and submicrometer scales. To explore their full potential, we utilize ferromagnetic materials with varying magnetic strengths, such as weak ferromagnets like NiCu and stronger ferromagnets like Ni and Co. For the superconducting layers, we employ niobium nitride (NbN), a material widely used for its high critical temperature (up to 16 K), excellent mechanical properties, and broad applicability.

Beyond the study of S/F/S structures, we also focus on NbN superconducting thin films. Thanks to NbN’s exceptional properties and straightforward preparation methods, it has become an important material in modern superconducting research. Its applications span from high-current technologies to quantum computing.